<template>
  <div class="cart">
    <Loading v-show="isLoading"></Loading>
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cartInfo in cartInfoList" :key="cartInfo.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="cartInfo.isChecked == 1"
              @change="updateChecked(cartInfo, $event)">
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl">
            <div class="item-msg">{{ cartInfo.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cartInfo.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <!-- 减少 -->
            <a href="javascript:void(0)" class="mins" @click="changeNum('decrease', -1, cartInfo, $event)">-</a>
            <!-- 输入 -->
            <input autocomplete="off" type="text" :value="cartInfo.skuNum" minnum="1" class="itxt"
              @change="changeNum('change', $event.target.value * 1, cartInfo)">
            <!-- 增加 -->
            <a href="javascript:void(0)" class="plus" @click="changeNum('increase', 1, cartInfo, $event)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cartInfo.skuPrice * cartInfo.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click.prevent="deleteById(cartInfo.skuId)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isAllCheck" @click="updateAllCheckedCart">
        <span>全选</span>
      </div>
      <div class="option">
        <a href="" @click.prevent="deleteAllCheckedCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{ allCheck }}</span>件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" @click="$router.push('/trade')">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Loading from "@/pages/ShopCart/Loading"
import { mapGetters } from 'vuex';
export default {
  name: 'ShopCart',
  components: { Loading },
  computed: {
    ...mapGetters('shopCart', ['cartList']),
    cartInfoList() {
      return this.cartList.cartInfoList || [];
    },
    totalPrice() {
      return this.cartInfoList.reduce((prev, item) => {
        if (item.isChecked == 1) {
          return prev += item.skuPrice * item.skuNum;
        } else return prev;
      }, 0)
    },
    allCheck() {
      return this.cartInfoList.reduce((prev, item) => {
        if (item.isChecked == 1) {
          return prev += 1;
        } else return prev;
      }, 0);
    },
    isAllCheck() {
      if(this.cartInfoList.length == 0)return false;
      return this.cartInfoList.every(item => item.isChecked == 1)
    },
  },
  data() {
    return {
      isLoading: false,
    }
  },
  mounted() {
    this.getCartList();
  },
  methods: {
    getCartList() {
      this.$store.dispatch('shopCart/getCartList');
    },
    // 修改数量
    // type是区分点击的那个东西，deepNum按钮的是变化量，输入框的是变化后的值
    async changeNum(type, disNum, cartInfo, dom) {
      if (cartInfo.skuNum == 1 && type == 'decrease') {
        return;
      }
      this.isLoading = true;
      if (type == 'increase') {
        disNum = 1;
      } else if (type == 'decrease') {
        disNum = cartInfo.skuNum > 1 ? -1 : 0;
      } else {
        if (isNaN(disNum) || disNum < 1) {
          disNum = 0;
        } else {
          disNum = parseInt(disNum) - cartInfo.skuNum;
        }
      };
      // 更新数据然后再拿数据
      try {
        await this.$store.dispatch('detail/addShopCart', { skuId: cartInfo.skuId, skuNum: disNum });
        this.getCartList();
      } catch (error) {
        this.isLoading = true;
        alert(error.message);
      }
    },
    async deleteById(skuId) {
      if (!confirm("你确定要删除吗？")) return;
      this.isLoading = true;
      try {
        await this.$store.dispatch('shopCart/deleteCartById', skuId);
        this.getCartList();
      } catch (error) {
        alert(error.message);
        this.isLoading = true;
      }
    },
    async updateChecked(cartInfo,$event){
      try {
        await this.$store.dispatch('shopCart/updateCartChecked',{skuId:cartInfo.skuId,isChecked: +$event.target.checked});
        this.getCartList();
      } catch (error) {
        alert(error.message);
      }
    },
    async deleteAllCheckedCart(){
      try {
        await this.$store.dispatch('shopCart/deleteALLCheckedCart');
        this.getCartList();
      } catch (error) {
        alert(error.message);
      }
    },
    async updateAllCheckedCart(event){
      if(this.cartInfoList.length == 0)return false;
      this.isLoading = true;
      try {
        await this.$store.dispatch('shopCart/updateAllCheckedCart',event.target.checked);
        this.getCartList();
      } catch (error) {
        alert(error.message);
        this.isLoading = false;
      }
    },
  },
  watch: {
    cartInfoList: {
      handler() {
        this.$nextTick(() => {
          this.isLoading = false;
        })
      }
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      &>div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;

      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        &>li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 10%;

        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>